diff options
| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2016-06-30 19:02:06 -0700 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2016-07-08 10:33:30 -0700 |
| commit | 2555a2d55822c9b2e1a933933dedd5d172067cea (patch) | |
| tree | c9e12f85064c8dbdb606da5dccbae62b643bc6fe /fs/f2fs | |
| parent | 237c0790e54020d522b8fd23097e8dcafb4e331d (diff) | |
| download | linux-2555a2d55822c9b2e1a933933dedd5d172067cea.tar.bz2 | |
f2fs: shrink critical region in spin_lock
This patch shrinks the critical region in spin_lock.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/f2fs.h | 23 |
1 files changed, 8 insertions, 15 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 096f16d343a8..d5892f56c44d 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -1136,30 +1136,23 @@ static inline void f2fs_i_blocks_write(struct inode *, blkcnt_t, bool); static inline bool inc_valid_block_count(struct f2fs_sb_info *sbi, struct inode *inode, blkcnt_t *count) { - block_t valid_block_count; - - spin_lock(&sbi->stat_lock); #ifdef CONFIG_F2FS_FAULT_INJECTION - if (time_to_inject(FAULT_BLOCK)) { - spin_unlock(&sbi->stat_lock); + if (time_to_inject(FAULT_BLOCK)) return false; - } #endif - valid_block_count = - sbi->total_valid_block_count + (block_t)(*count); - if (unlikely(valid_block_count > sbi->user_block_count)) { - *count = sbi->user_block_count - sbi->total_valid_block_count; + spin_lock(&sbi->stat_lock); + sbi->total_valid_block_count += (block_t)(*count); + if (unlikely(sbi->total_valid_block_count > sbi->user_block_count)) { + *count -= sbi->total_valid_block_count - sbi->user_block_count; + sbi->total_valid_block_count = sbi->user_block_count; if (!*count) { spin_unlock(&sbi->stat_lock); return false; } } - /* *count can be recalculated */ - f2fs_i_blocks_write(inode, *count, true); - sbi->total_valid_block_count = - sbi->total_valid_block_count + (block_t)(*count); spin_unlock(&sbi->stat_lock); + f2fs_i_blocks_write(inode, *count, true); percpu_counter_add(&sbi->alloc_valid_block_count, (*count)); return true; } @@ -1171,9 +1164,9 @@ static inline void dec_valid_block_count(struct f2fs_sb_info *sbi, spin_lock(&sbi->stat_lock); f2fs_bug_on(sbi, sbi->total_valid_block_count < (block_t) count); f2fs_bug_on(sbi, inode->i_blocks < count); - f2fs_i_blocks_write(inode, count, false); sbi->total_valid_block_count -= (block_t)count; spin_unlock(&sbi->stat_lock); + f2fs_i_blocks_write(inode, count, false); } static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type) |